<<A good point of reference if exposure is in question, carrying a grey card would help establish the mid tone point.>>
Sometimes I use a lens white balance cap and set from there, this time I used auto as changing conditions allowed little time to set white balance. I use Matrix metering and occasionally spot if the subject is a small portion of the frame, but the larger areas has varying exposure references, such as a bright sky, but a dark foreground. I then take the image at in between the two exposures and usually fit a low ND grad filter to the lens. I find that works well.
However, the two images below are simple shots demonstrating two different situations. The first in the Church, SB-800 flash with no EV compensation. The amount of opportunity in this image to blow highlights abound. The second outdoors where a value of -0.67 was required to avoid blown highlights. Both images taken in Matrix metering. I don't want to hi-jack this thread, but these are a few examples.
I hasten to add I am not a wedding photographer and actually find it mind numbingly boring, however these are some friends, so I made an exception